Homotopical structure of linear groups of Banach spaces Mitjagin, B. — 1972 General Topology and its Relations to Modern Analysis and Algebra
Unsolved Problems N. Aronszajn; L. Gross; S. Kwapień; N. Nielsen; A. Pełczyński; A. Pietsch; L. Schwartz; P. Saphar; S. Chevet; R. Dudley; D. Garling; N. Kalton; B. Mitjagin; S. Rolewicz; E. Schock; J. Daleckiĭ; J. Dobrakov; B. Gelbaum; G. Henkin; L. Nachbin; N. Peck; L. Waelbroeck; P. Porcelli; M. Rao; M. Zerner; V. Zakharjuta — 1970 Studia Mathematica 1. The operator ideals and measures in linear spaces 469-472 2. Schauder bases and linear topological invariants 473-478 3. Various problems 479-483